Wood species . . . meh. I've played identical electric guitars made out of the same wood species and found stark differences.![]()
That surely happens, but have you ever tried for example, 3 guitars, with the same pickups, with the necks and fretboards cut from the same board and three different bodies? That gives you a great basis for comparison.
I have done that.
I have also tried three fretboard materials, for example, on the same Aristides guitar. Since those are extremely consistent, any little change is clearly audible. Then it becomes clear, beyond the shadow of a doubt, that different materials make up for different tonal spectrums.
A dozen guitars is anekdotal: hundreds of guitars, that's statistic.